TWI439721B - Imaging lens system - Google Patents

Description

Camera lens system

The present invention relates to an imaging lens system; and more particularly to an imaging lens system for use in a miniaturized camera lens system or three-dimensional (3D) imaging application for electronic products.

In recent years, with the rise of portable electronic products with photographic functions, the demand for miniaturized photographic lenses has been increasing. The photosensitive element of a general photographic lens is nothing more than a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor Sensor (CMOS Sensor). With the advancement of semiconductor process technology, the pixel size of the photosensitive element has been reduced, and the miniaturized photographic lens has been gradually developed into the high-pixel field, and the requirements for image quality have been increasing.

In order to reduce the manufacturing cost, the miniaturized camera lens is mainly a two-lens lens structure. For example, a two-lens lens camera lens is disclosed in U.S. Patent No. 7,525,741. However, since only two lens pairs are aberrations. The correction ability is limited, and it cannot meet the requirements of higher-order camera modules. However, the configuration of too many lenses will make it difficult to achieve miniaturization of the total length of the lens.

In order to obtain good image quality and maintain the miniaturization of the lens, an optical lens for imaging with three lenses is a feasible solution. U.S. Patent No. 7,564,635 discloses an imaging lens having three lenses, but all three lenses are positive refractive power lenses, which makes correction of aberrations (such as chromatic aberration) in the system difficult, and affects imaging quality. In view of this, there is an urgent need for an optical lens for imaging that can be applied to an electronic product that is light and portable, and that has good imaging quality and does not cause the total length of the lens to be too long.

By the following configuration, the imaging lens system design can make the thickness of the second lens center suitable, in addition to making the mirror space more effective, and avoiding the second lens being too thin or too thick. The lens manufacturing problem such as poor lens formation ensures the imaging stability of the imaging lens system and improves the yield of the product.

The invention provides an image pickup lens system, which is sequentially: from the object side to the image side, a first lens having a positive refractive power; and a second lens having a negative refractive power, the object side surface is a concave surface and the image side surface is a convex surface, The side surface and the image side surface are all aspherical surfaces, and the material thereof is plastic; and a third lens having a negative refractive power, the object side surface is convex and the image side surface is concave, and the object side surface and the image side surface are aspherical surfaces, At least one surface of the object side and the image side surface is provided with at least one inflection point, and the material thereof is plastic; wherein the refractive lens of the camera lens system is the first lens, the second lens and the third lens And three lenses; and the center of the three lenses has the largest thickness; the first lens has a center thickness of CT1, the second lens has a center thickness of CT2, and the third lens has a center thickness of CT3, the radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the first lens is R2, and the distance between the second lens and the third lens on the optical axis is T23, which satisfies the following relationship Formula: 0.35<CT1/CT2<1.00; 0.35<CT 3/CT2<1.00; -3.0<(R1+R2)/(R1-R2)<0; and 0.65<T23/CT3<1.80.

In another aspect, the present invention provides an image pickup lens system, which is sequentially from the object side to the image side: a first lens having a positive refractive power; and a second lens having a negative refractive power, the object side is concave and like a side surface The convex surface, the object side surface and the image side surface are all aspherical surfaces, and the material thereof is plastic; and a third lens having a negative refractive power, the object side surface is convex and the image side surface is concave, and the object side surface and the image side surface are both The at least one surface of the object surface and the image side surface is provided with at least one inflection point, and the material thereof is plastic; wherein the lens of the lens system having the refractive power is the first lens, the second lens and The third lens or the like has three lenses; and the third lens has a center thickness of the third lens; the first lens has a center thickness of CT1, and the second lens has a center thickness of CT2, and the third lens The center thickness of the first lens is CT1, the radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the first lens is R2, and the distance between the first lens and the second lens on the optical axis is T12. Between the second lens and the third lens The distance on the optical axis is T23, which satisfies the following relationship: 0.35<CT1/CT2<1.00; 0.35<CT3/CT2<1.00; -3.0<(R1+R2)/(R1-R2)<0; <T12/T23<1.55.

In still another aspect, the present invention provides an image pickup lens system, which is sequentially from the object side to the image side: a first lens having a positive refractive power; and a second lens having a negative refractive power, the object side is concave and like The side surface is a convex surface, the object side surface and the image side surface are all aspherical surfaces, and the material thereof is plastic; and a third lens having a negative refractive power, the object side surface is convex surface and the image side surface is concave surface, and the object side surface and the image side surface are both In the aspherical surface, at least one of the object side surface and the image side surface is provided with at least one inflection point, and the material thereof is plastic; wherein the refractive lens of the camera lens system is the first lens and the second lens And three lenses such as the third lens; and the third lens having the largest thickness of the three lenses; the center thickness of the first lens is CT1, and the center thickness of the second lens is CT2, the third The center thickness of the lens is CT3, the radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the first lens is R2, and the dispersion coefficient of the second lens is V2, which satisfies the following relationship: 0.35<CT1 /CT2<1.00;0.35<CT3/CT2<1.00; -3.0 < (R1 + R2) / (R1 - R2) < 0.0; and 15 < V2 < 24.5.

In the image pickup lens system of the present invention, the first lens has a positive refractive power and provides a main refractive power of the system, which is advantageous for shortening the total length of the image pickup lens system. The second lens has a negative refractive power, which helps to correct the aberration generated by the first lens having a positive refractive power, and at the same time facilitates correcting the chromatic aberration of the system. The third lens has a negative refractive power, which can make the Principal Point of the optical system away from the imaging surface, and is beneficial to shortening the total optical length of the system to promote miniaturization of the lens.

In the image pickup lens system of the present invention, the second lens is a crescent lens having a concave surface on the object side surface and a convex surface on the image side surface, which is advantageous for correcting the aberration generated by the first lens and facilitating correction of the system image. Scattered. The third lens may be a crescent lens having a convex side and a concave side surface, which may help to correct astigmatism and higher order aberrations generated by the system. In addition, when the third lens is provided with an inflection point, the angle of the off-axis field of view light incident on the photosensitive element can be effectively suppressed to increase the receiving efficiency of the image sensing element, and the off-axis view can be further corrected. The aberration of the field.

The invention provides an image pickup lens system, which is sequentially: from the object side to the image side, a first lens having a positive refractive power; and a second lens having a negative refractive power, the object side surface is a concave surface and the image side surface is a convex surface, The side surface and the image side surface are all aspherical surfaces, and the material thereof is plastic; and a third lens having a negative refractive power, the object side surface is convex and the image side surface is concave, and the object side surface and the image side surface are aspherical surfaces, At least one surface of the object side and the image side surface is provided with at least one inflection point, and the material thereof is plastic; wherein the refractive lens of the camera lens system is the first lens, the second lens and the third lens And three lenses; and the center of the three lenses has the largest thickness; the first lens has a center thickness of CT1, the second lens has a center thickness of CT2, and the third lens has a center thickness of CT3, the radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the first lens is R2, and the distance between the second lens and the third lens on the optical axis is T23, which satisfies the following relationship Formula: 0.35<CT1/CT2<1.00; 0.35<CT 3/CT2<1.00; -3.0<(R1+R2)/(R1-R2)<0; and 0.65<T23/CT3<1.80.

When the foregoing imaging lens system satisfies the following relationship: 0.35<CT1/CT2<1.00; 0.35<CT3/CT2<1.00, the center thickness configuration of the first lens and the second lens, and the second lens and the third lens The center thickness configuration is suitable, which can contribute to the assembly and space configuration of the lens assembly, and can avoid lens manufacturing problems such as poor lens formation caused by the second lens being too thin or too thick, thereby ensuring stable imaging of the imaging lens system. To improve the yield of the product; preferably, the following relationship is satisfied: 0.50 < CT1/CT2 < 0.94; 0.50 < CT3 / CT2 < 0.94.

When the aforementioned image pickup lens system satisfies the following relationship: -3.0 < (R1 + R2) / (R1 - R2) < 0, it is advantageous for the correction of the system spherical aberration (Spherical Aberration), preferably, the following relationship is satisfied. :-2.5<(R1+R2)/(R1-R2)<-0.5.

When the foregoing imaging lens system satisfies the following relationship: 0.65<T23/CT3<1.80, the spacing between the second lens and the third lens on the axis and the thickness of the third lens can be effectively controlled, in addition to facilitating the assembly configuration of the lens. It is more conducive to the use of the mirror space to promote the miniaturization of the lens.

When the center thickness of the three lenses is the second lens in the camera lens system, the lens thickness in the system can be appropriately configured, and the lens produced by the second lens being too thin or too thick can be avoided. The lens manufacturing problem such as poor molding not only contributes to the formability and homogeneity of the lens during plastic injection molding, but also enables the image pickup lens system to have good image quality.

In the foregoing imaging lens system of the present invention, the overall focal length of the imaging lens system is f, and the focal length of the third lens is f3. Preferably, when the aforementioned imaging lens system satisfies the following relationship: -0.45<f/f3<0 The third lens can be effectively controlled to not be excessively large, and on the one hand, the system aberration can be reduced, and on the other hand, the sensitivity of the camera lens system can be reduced.

In the image pickup lens system of the present invention, the image pickup lens system is further provided with an aperture, the distance from the aperture to the image side of the third lens on the optical axis is Sd, and the object side surface of the first lens to the image of the third lens The distance of the side surface on the optical axis is Td. Preferably, when the aforementioned image pickup lens system satisfies the following relationship: 0.65 < Sd / Td < 0.90, it is advantageous to achieve a good balance between the telecentric and wide viewing angle characteristics.

In the foregoing imaging lens system of the present invention, the focal length of the second lens is f2, and the focal length of the third lens is f3. Preferably, when the aforementioned imaging lens system satisfies the following relationship: 0<f2/f3<0.75, The arrangement of the refractive power of the second lens and the third lens is balanced, which contributes to the correction of the aberration and the decrease of the sensitivity.

In the camera lens system of the present invention, the distance between the first lens and the second lens on the optical axis is T12, and the distance between the second lens and the third lens on the optical axis is T23, preferably In the above, when the camera lens system satisfies the following relationship: 0.5<T12/T23<1.55, the distance between the lenses in the lens group can be prevented from being too large or too small, which is beneficial to the lens assembly configuration and is more beneficial to the mirror. The use of group space to promote the miniaturization of the lens.

In the foregoing imaging lens system of the present invention, the overall focal length of the imaging lens system is f, and the focal length of the second lens is f2. Preferably, when the aforementioned imaging lens system satisfies the following relationship: -0.70<f/f2<-0.25 The refractive power of the second lens is suitable, which can help correct the aberration generated by the first lens, and does not make the lens of the lens too large, so it is beneficial to reduce the sensitivity of the system.

In the image pickup lens system of the present invention, the image side curvature radius of the third lens is R6, and the overall focal length of the image pickup lens system is f. Preferably, when the aforementioned image pickup lens system satisfies the following relationship: 0.1<R6/f< At 0.6 o'clock, an appropriate refractive power can be obtained by the arrangement of the curvature radius of the image side of the third lens, which is advantageous for correcting system aberrations.

In the foregoing camera lens system of the present invention, the second lens has a dispersion coefficient of V2. Preferably, when the aforementioned image pickup lens system satisfies the following relationship: 15<V2<24.5, it is more conducive to chromatic aberration in the image pickup lens system. Corrected.

In the foregoing camera lens system of the present invention, the center thickness of the first lens is CT1, the center thickness of the second lens is CT2, and the center thickness of the third lens is CT3. Preferably, when the aforementioned lens system satisfies the following relationship When 0.80 mm<CT1+CT2+CT3<1.85 mm, the center thickness of the first lens, the second lens and the third lens are appropriately arranged to facilitate the assembly and spatial arrangement of the lens assembly.

In another aspect, the present invention provides an image pickup lens system, which is sequentially from the object side to the image side: a first lens having a positive refractive power; and a second lens having a negative refractive power, the object side is concave and like a side surface The convex surface, the object side surface and the image side surface are all aspherical surfaces, and the material thereof is plastic; and a third lens having a negative refractive power, the object side surface is convex and the image side surface is concave, and the object side surface and the image side surface are both The at least one surface of the object surface and the image side surface is provided with at least one inflection point, and the material thereof is plastic; wherein the lens of the lens system having the refractive power is the first lens, the second lens and The third lens or the like has three lenses; and the third lens has a center thickness of the third lens; the first lens has a center thickness of CT1, and the second lens has a center thickness of CT2, and the third lens The center thickness of the first lens is CT1, the radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the first lens is R2, and the distance between the first lens and the second lens on the optical axis is T12. Between the second lens and the third lens The distance on the optical axis is T23, which satisfies the following relationship: 0.35<CT1/CT2<1.00; 0.35<CT3/CT2<1.00; -3.0<(R1+R2)/(R1-R2)<0; <T12/T23<1.55.

When the foregoing imaging lens system satisfies the following relationship: 0.35<CT1/CT2<1.00; 0.35<CT3/CT2<1.00, the center thickness configuration of the first lens, the second lens and the third lens is suitable, and may have It can help the lens assembly and space configuration, and can avoid lens manufacturing problems such as poor lens molding caused by the second lens being too thin or too thick, thereby ensuring the imaging stability of the imaging lens system and improving the yield of the product; Preferably, the following relationship is satisfied: 0.50 < CT1/CT2 < 0.94.

When the aforementioned image pickup lens system satisfies the following relationship: -3.0<(R1+R2)/(R1-R2)<0, it is advantageous for the correction of the spherical aberration of the system, and preferably, the following relationship is satisfied: -2.5< (R1+R2)/(R1-R2)<-0.5.

When the foregoing camera lens system satisfies the following relationship: 0.5<T12/T23<1.55, the distance between the lenses in the lens group can be prevented from being too large or too small, which is beneficial to the lens assembly and the mirror space. Use to promote the miniaturization of the lens.

In the image pickup lens system of the present invention, the image pickup lens system is further provided with an aperture, the distance from the aperture to the image side of the third lens on the optical axis is Sd, and the object side surface of the first lens to the image of the third lens The distance of the side surface on the optical axis is Td. Preferably, when the aforementioned image pickup lens system satisfies the following relationship: 0.65 < Sd / Td < 0.90, it is advantageous to achieve a good balance between the telecentric and wide viewing angle characteristics.

In the foregoing imaging lens system of the present invention, the focal length of the second lens is f2, and the focal length of the third lens is f3. Preferably, when the aforementioned imaging lens system satisfies the following relationship: 0<f2/f3<0.75, The arrangement of the refractive power of the second lens and the third lens is balanced, which contributes to the correction of the aberration and the decrease of the sensitivity.

In the foregoing imaging lens system of the present invention, the overall focal length of the imaging lens system is f, and the focal length of the second lens is f2. Preferably, when the aforementioned imaging lens system satisfies the following relationship: -0.70<f/f2<-0.25 The refractive power of the second lens is suitable, which can help correct the aberration generated by the first lens, and does not make the lens of the lens too large, so it is beneficial to reduce the sensitivity of the system.

In the image pickup lens system of the present invention, the image side curvature radius of the third lens is R6, and the overall focal length of the image pickup lens system is f. Preferably, when the aforementioned image pickup lens system satisfies the following relationship: 0.1<R6/f< At 0.6 o'clock, the appropriate refractive power can be obtained by the arrangement of the curvature radius of the image side of the third lens, which is advantageous for correcting the aberration and reducing the sensitivity of the system to errors.

In the foregoing camera lens system of the present invention, the center thickness of the first lens is CT1, the center thickness of the second lens is CT2, and the center thickness of the third lens is CT3. Preferably, when the aforementioned lens system satisfies the following relationship When 0.80 mm<CT1+CT2+CT3<1.85 mm, the center thickness of the first lens, the second lens and the third lens are appropriately arranged to facilitate the assembly and spatial arrangement of the lens assembly.

In still another aspect, the present invention provides an image pickup lens system, which is sequentially from the object side to the image side: a first lens having a positive refractive power; and a second lens having a negative refractive power, the object side is concave and like The side surface is a convex surface, the object side surface and the image side surface are all aspherical surfaces, and the material thereof is plastic; and a third lens having a negative refractive power, the object side surface is convex surface and the image side surface is concave surface, and the object side surface and the image side surface are both In the aspherical surface, at least one of the object side surface and the image side surface is provided with at least one inflection point, and the material thereof is plastic; wherein the refractive lens of the camera lens system is the first lens and the second lens And three lenses such as the third lens; and the third lens having the largest thickness of the three lenses; the center thickness of the first lens is CT1, and the center thickness of the second lens is CT2, the third The center thickness of the lens is CT3, the radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the first lens is R2, and the dispersion coefficient of the second lens is V2, which satisfies the following relationship: 0.35<CT1 /CT2<1.00;0.35<CT3/CT2<1.00; -3.0 < (R1 + R2) / (R1 - R2) < 0.0; and 15 < V2 < 24.5.

When the foregoing imaging lens system satisfies the following relationship: 0.35<CT1/CT2<1.00; 0.35<CT3/CT2<1.00, the center thickness configuration of the first lens, the second lens and the third lens is suitable, and may have It can help the lens assembly and space configuration, and can avoid lens manufacturing problems such as poor lens molding caused by the second lens being too thin or too thick, thereby ensuring the imaging stability of the imaging lens system and improving the yield of the product; Preferably, the following relationship is satisfied: 0.50 < CT1/CT2 < 0.94.

In the foregoing camera lens system of the present invention, the center thickness of the first lens is CT1, the center thickness of the second lens is CT2, and the center thickness of the third lens is CT3. Preferably, when the aforementioned lens system satisfies the following relationship When 0.80 mm<CT1+CT2+CT3<1.85 mm, the center thickness of the first lens, the second lens and the third lens are appropriately arranged to facilitate the assembly and spatial arrangement of the lens assembly.

In the camera lens system of the present invention, the distance between the first lens and the second lens on the optical axis is T12, and the distance between the second lens and the third lens on the optical axis is T23, preferably In the above, when the camera lens system satisfies the following relationship: 0.5<T12/T23<1.55, the distance between the lenses in the lens group can be prevented from being too large or too small, which is beneficial to the lens assembly configuration and is more beneficial to the mirror. The use of group space to promote the miniaturization of the lens.

In the camera lens system of the present invention, the material of the lens can be glass or plastic. If the material of the lens is glass, the degree of freedom of the refractive power of the camera lens system can be increased. If the lens material is plastic, the production cost can be effectively reduced. . In addition, an aspherical surface can be disposed on the mirror surface, and the aspherical surface can be easily formed into a shape other than the spherical surface, and more control variables are obtained to reduce the aberration and thereby reduce the number of lenses used, thereby effectively reducing the image pickup lens of the present invention. The total length of the system.

In the image pickup lens system of the present invention, if the surface of the lens is convex, the surface of the lens is convex at the paraxial axis; if the surface of the lens is concave, it indicates that the surface of the lens is concave at the paraxial axis.

In the image pickup lens system of the present invention, at least one aperture, such as a Glare Stop or a Field Stop, may be provided to reduce stray light and contribute to image quality improvement. In addition, in the image pickup lens system of the present invention, the arrangement of the aperture may be front (before the first lens), centered (between the first lens and the imaging surface) or before the imaging surface, and the arrangement is arranged by the optical designer. Demand to decide.

The image pickup lens system of the present invention will be described in detail by the following specific embodiments in conjunction with the drawings.

"First Embodiment"

Please refer to FIG. 1A for the first embodiment of the present invention, and the first B diagram for the aberration curve of the first embodiment. The image pickup lens system of the first embodiment is mainly composed of three lenses, and includes, from the object side to the image side, a first lens (110) having a positive refractive power, and the object side surface (111) is a convex surface and an image side surface ( 112) is a concave surface, the material is plastic, and the object side surface (111) and the image side surface (112) of the first lens (110) are aspherical surfaces; A second lens (120) having a negative refractive power, the object side surface (121) being a concave surface and the image side surface (122) being a convex surface, the material of which is plastic, the object side surface (121) and the image of the second lens (120) The side surface (122) is aspherical; and a third lens (130) having a negative refractive power, the object side surface (131) is a convex surface and the image side surface (132) is a concave surface, and the material is plastic, the third lens ( 130) The object side surface (131) and the image side surface (132) are both aspherical surfaces, and the object side surface (131) and the image side surface (132) of the third lens (130) are provided with at least one inflection point; wherein The refractive lens of the camera lens system is three lenses, which are the first lens (110), the second lens (120) and the third lens (130), respectively; and the three lenses (110, The largest thickness of the center of the 120, 130) is the second lens (120); wherein the camera lens system is further provided with an aperture (100) disposed between the first lens (110) and the second lens (120) Further comprising an infrared filter (IR) (140) disposed between the image side (132) of the third lens (130) and an imaging surface (150); the infrared filter (140) is made of glass And it does not affect the focal length of the imaging lens system of the present invention.

The detailed optical data of the first embodiment is shown in Table 1. The aspherical data is shown in Table 2. The unit of curvature radius, thickness and focal length is mm, and HFOV is defined as half of the maximum viewing angle.

The equation for the above aspheric curve is expressed as follows:

Where: X: the distance from the aspherical surface to the optical axis Y, the relative distance from the tangent to the apex on the aspherical optical axis; Y: the distance between the point on the aspheric curve and the optical axis; R: the radius of curvature ;k: taper coefficient; A i : i-th order aspheric coefficient.

In the image pickup lens system of the first embodiment, the focal length of the image pickup lens system For f, the relation is: f = 2.85 (mm).

In the image pickup lens system of the first embodiment, the aperture value of the image pickup lens system is Fno, and the relational expression is Fno=2.50.

In the image pickup lens system of the first embodiment, half of the maximum angle of view in the image pickup lens system is HFOV, and the relational expression is HFOV = 31.2 (degrees).

In the image pickup lens system of the first embodiment, the second lens (120) has a dispersion coefficient of V2 and a relational expression of V2 = 23.8.

In the image pickup lens system of the first embodiment, the center thickness of the first lens (110) is CT1, and the center thickness of the second lens (120) is CT2, and the relationship is: CT1/CT2=0.75.

In the image pickup lens system of the first embodiment, the center thickness of the third lens (130) is CT3, and the center thickness of the second lens (120) is CT2, and the relationship is: CT3/CT2=0.82.

In the image pickup lens system of the first embodiment, the center thickness of the first lens (110) is CT1, the center thickness of the second lens (120) is CT2, and the center thickness of the third lens (130) is CT3. The relationship is: CT1+CT2+CT3=1.46 (mm).

In the imaging lens system of the first embodiment, the distance between the first lens (110) and the second lens (120) on the optical axis is T12, and the second lens (120) and the third lens (130) The distance between the optical axis is T23, and the relationship is: T12/T23=1.06.

In the image pickup lens system of the first embodiment, the distance between the second lens (120) and the third lens (130) on the optical axis is T23, and the center thickness of the third lens (130) is CT3. The relationship is: T23/CT3=0.93.

In the image pickup lens system of the first embodiment, the first lens (110) The side surface (111) has a radius of curvature R1, and the image side surface (112) of the first lens (110) has a radius of curvature R2, and the relationship is: (R1+R2)/(R1-R2)=-1.30.

In the image pickup lens system of the first embodiment, the image side surface (132) of the third lens (130) has a radius of curvature of R6, and the overall focal length of the image pickup lens system is f, and the relationship is: R6/f=0.37.

In the image pickup lens system of the first embodiment, the overall focal length of the image pickup lens system is f, and the focal length of the second lens (120) is f2, and the relational expression is f/f2=-0.27.

In the image pickup lens system of the first embodiment, the overall focal length of the image pickup lens system is f, and the focal length of the third lens (130) is f3, and the relational expression is f/f3=-0.12.

In the image pickup lens system of the first embodiment, the focal length of the second lens (120) is f2, and the focal length of the third lens (130) is f3, and the relationship is f2/f3=0.45.

In the image pickup lens system of the first embodiment, the distance from the aperture (100) to the image side surface (132) of the third lens (130) on the optical axis is Sd, and the object side of the first lens (110) is The image side surface (132) of the third lens (130) has a distance Td on the optical axis, and the relationship is: Sd/Td=0.80.

Second Embodiment

Please refer to FIG. 2A for the second embodiment of the present invention and the second B diagram for the aberration curve of the second embodiment. The image pickup lens system of the second embodiment is mainly composed of three lenses, and includes, from the object side to the image side, a first lens (210) having a positive refractive power, and the object side surface (211) is a convex surface and an image side surface ( 212) is a convex surface, the material is plastic, the first lens (210) Both the object side surface (211) and the image side surface (212) are aspherical surfaces; a second lens (220) having a negative refractive power, the object side surface (221) is a concave surface and the image side surface (222) is a convex surface, and the material is plastic. The object side surface (221) and the image side surface (222) of the second lens (220) are aspherical surfaces; and a third lens (230) having a negative refractive power, the object side surface (231) is a convex surface and an image side surface. (232) is a concave surface, the material is plastic, the object side surface (231) and the image side surface (232) of the third lens (230) are aspherical surfaces, and the object side surface (231) of the third lens (230) is The side surface (232) is provided with at least one inflection point; wherein the refractive lens of the camera lens system is three lenses, which are the first lens (210), the second lens (220) and the a third lens (230); and the third lens (210, 220, 230) has a center thickness of the second lens (220); wherein the lens system is further provided with an aperture (200) Between the first lens (210) and the second lens (220); further comprising an infrared filter (IR) (240) disposed on the image side (232) of the third lens (230) Between an imaging surface (250); IR-cut filter (240) is made of glass and which do not affect the present invention, the focal length of the imaging lens system.

The detailed optical data of the second embodiment is shown in Table 3. The aspherical data is shown in Table 4. The unit of curvature radius, thickness and focal length is mm, and HFOV is defined as half of the maximum viewing angle.

The second embodiment shows the aspheric curve equation as in the form of the first embodiment. In addition, the parameters of the respective relationships are as explained in the first embodiment, but the values of the respective relationships are as listed in Table 5:

Third Embodiment

Please refer to FIG. 3A for the third embodiment of the present invention, and the third B diagram for the aberration curve of the third embodiment. The image pickup lens system of the third embodiment is mainly composed of three lenses, and includes, from the object side to the image side, a first lens (310) having a positive refractive power, and the object side surface (311) is a convex surface and an image side surface ( 312) is a concave surface, the material is plastic, the object side surface (311) and the image side surface (312) of the first lens (310) are aspherical surfaces; a second lens (320) having a negative refractive power, the object side (321) is a concave surface and the image side surface (322) is a convex surface, the material of which is plastic, the object side surface (321) and the image side surface (322) of the second lens (320) are aspherical surfaces; and a negative refractive power The third lens (330) has a convex surface and an image side surface (332) which are concave surfaces and are made of plastic. The object side surface (331) and the image side surface (332) of the third lens (330) are both An aspherical surface, wherein the object side surface (331) and the image side surface (332) of the third lens (330) are provided with at least one inflection point; wherein the lens of the lens system having the refractive power is three lenses, respectively The first lens (310), the second lens (320), and the third lens (330); and the center of the three lenses (310, 320, 330) having the largest thickness is the second lens (320) );its The camera lens system is further provided with an aperture (300) disposed between the first lens (310) and the second lens (320); and an infrared filter (IR-filter) (340) Positioned between the image side surface (332) of the third lens (330) and an image forming surface (350); the infrared filter filter (340) is made of glass and does not affect the image mirror of the present invention. The focal length of the film system.

The detailed optical data of the third embodiment is shown in Table 6. The aspherical data is as shown in Table 7, wherein the unit of curvature radius, thickness and focal length is mm, and HFOV is defined as half of the maximum viewing angle.

The third embodiment shows the aspheric curve equation as in the form of the first embodiment. In addition, the parameters of the respective relationships are as explained in the first embodiment, but the values of the respective relationships are as listed in Table 8:

Fourth Embodiment

For the fourth embodiment of the present invention, please refer to FIG. 4A. For the aberration curve of the fourth embodiment, please refer to FIG. The image pickup lens system of the fourth embodiment is mainly composed of three lenses, and includes, from the object side to the image side, a first lens (410) having a positive refractive power, and the object side surface (411) is a convex surface and an image side surface ( 412) is a concave surface, the material is plastic, the object side surface (411) and the image side surface (412) of the first lens (410) are aspherical surfaces; a second lens (420) having a negative refractive power, the object side (421) is a convex surface and the image side surface (422) is a convex surface, and the material is plastic. The object side surface (421) and the image side surface (422) of the second lens (420) are aspherical surfaces; and a negative refractive power The third lens (430) has a convex side and an image side surface (432) as concave surfaces, and is made of plastic. The object side surface (431) and the image side surface (432) of the third lens (430) are both An aspheric surface, and the object side surface (431) and the image side surface (432) of the third lens (430) are provided with at least one inflection point; wherein the lens of the lens system has a refractive power of three a mirror, which is the first lens (410), the second lens (420), and the third lens (430), respectively; and the center thickness of the three lenses (410, 420, 430) is the largest a second lens (420); wherein the image pickup lens system is further provided with an aperture (400) disposed between the object and the first lens (410); and an infrared filter (IR-filter) ( 440) disposed between the image side surface (432) of the third lens (430) and an imaging surface (450); the infrared filter filter (440) is made of glass and does not affect the imaging lens of the present invention. The focal length of the system.

The detailed optical data of the fourth embodiment is shown in Table 9, and the aspherical data is as shown in Table 10, wherein the unit of curvature radius, thickness and focal length is mm, and HFOV is defined as half of the maximum viewing angle.

The fourth embodiment shows the aspheric curve equation as in the form of the first embodiment. In addition, the parameters of the respective relationships are as explained in the first embodiment, but the values of the respective relationships are as listed in Table 11:

Fifth Embodiment

For the fifth embodiment of the present invention, please refer to FIG. 5A. For the aberration curve of the fifth embodiment, refer to FIG. The image pickup lens system of the fifth embodiment is mainly composed of three lenses, and includes, from the object side to the image side, a first lens (510) having a positive refractive power, and the object side surface (511) is a convex surface and an image side surface ( 512) is a convex surface, the material of which is glass, and the object side surface (511) and the image side surface (512) of the first lens (510) are aspherical surfaces; A second lens (520) having a negative refractive power, the object side surface (521) being a concave surface and the image side surface (522) being a convex surface, the material of which is plastic, the object side surface (521) and the image of the second lens (520) The side surface (522) is aspherical; and a third lens (530) having a negative refractive power, the object side surface (531) is a convex surface and the image side surface (532) is a concave surface, and the material is plastic, the third lens ( The object side surface (531) and the image side surface (532) of the 530) are all aspherical surfaces, and the object side surface (531) and the image side surface (532) of the third lens (530) are provided with at least one inflection point; wherein The refractive lens of the camera lens system is three lenses, which are respectively the first lens (510), the second lens (520) and the third lens (530); and the three lenses (510, The largest thickness of the center of the 520, 530) is the second lens (520); wherein the camera lens system is further provided with an aperture (500) disposed between the first lens (510) and the second lens (520) Further comprising an infrared filter (IR) (540) disposed between the image side (532) of the third lens (530) and an imaging surface (550); the infrared filter (540) is made of glass And it does not affect the focal length of the imaging lens system of the present invention.

The detailed optical data of the fifth embodiment is shown in Table 12. The aspherical data is shown in Table 13. The unit of curvature radius, thickness and focal length is mm, and HFOV is defined as half of the maximum viewing angle.

The fifth embodiment shows the aspheric curve equation as in the form of the first embodiment. In addition, the parameters of the respective relationships are as explained in the first embodiment, but the values of the respective relationships are as listed in Table XIV:

Sixth Embodiment

Please refer to FIG. 6A for the sixth embodiment of the present invention, and the sixth B diagram for the aberration curve of the sixth embodiment. The image pickup lens system of the sixth embodiment is mainly composed of three lenses, and includes, from the object side to the image side, a first lens (610) having a positive refractive power, and the object side surface (611) is a convex surface and an image side surface ( 612) is a convex surface, the material is glass, the object side surface (611) and the image side surface (612) of the first lens (610) are aspherical surfaces; a second lens (620) having a negative refractive power, the object side surface (621) is a concave surface and the image side surface (622) is a convex surface, the material of which is plastic, the object side surface (621) and the image side surface (622) of the second lens (620) are aspherical surfaces; and a negative refractive power The third lens (630) has a convex side and an image side surface (632) as concave surfaces, and is made of plastic. The object side surface (631) and the image side surface (632) of the third lens (630) are both An aspheric surface, and the object side surface (631) and the image side surface (632) of the third lens (630) are provided with at least one inflection point; wherein the lens of the lens system having refractive power is three lenses, respectively The first lens (610), the second lens (620), and the third lens (630); and the center of the three lenses (610, 620, 630) having the largest thickness is the second lens (620) );its The camera lens system is further provided with an aperture (600) disposed between the first lens (610) and the second lens (620); and an infrared filter (IR-filter) (640) Positioned between the image side surface (632) of the third lens (630) and an imaging surface (650); the infrared filter filter (640) is made of glass and does not affect the imaging lens system of the present invention. focal length.

The detailed optical data of the sixth embodiment is shown in Table fifteen, and the aspherical data is as shown in Table 16, wherein the unit of curvature radius, thickness and focal length is mm, and HFOV is defined as half of the maximum angle of view.

The representation of the aspherical curve equation of the sixth embodiment is like the form of the first embodiment. In addition, the parameters of the respective relationships are as explained in the first embodiment, but the values of the respective relationships are as listed in Table 17:

Seventh Embodiment

For the seventh embodiment of the present invention, please refer to FIG. 7A. For the aberration curve of the seventh embodiment, refer to FIG. The image pickup lens system of the seventh embodiment is mainly composed of three lenses, and includes, from the object side to the image side, a first lens (710) having a positive refractive power, and the object side surface (711) is a convex surface and an image side surface ( 712) is a convex surface, the material is plastic, the object side surface (711) and the image side surface (712) of the first lens (710) are aspherical surfaces; a second lens (720) having a negative refractive power, the object side (721) is a concave surface and the image side surface (722) is a convex surface, and the material is plastic. The object side surface (721) and the image side surface (722) of the second lens (720) are aspherical surfaces; and a negative refractive power The third lens (730) has a convex side and a concave side of the image side surface (731), and is made of plastic. The object side surface (731) and the image side surface (732) of the third lens (730) are both An aspherical surface, and the object side surface (731) and the image side surface (732) of the third lens (730) are provided with at least one inflection point; wherein the lens of the lens system having the refractive power is three lenses, respectively The first lens (710), the second lens (720), and the third a lens (730); and the largest thickness of the three lenses (710, 720, 730) is the second lens (720); wherein the camera lens system is further provided with an aperture (700) placed at the first Between the lens (710) and the second lens (720); further comprising an infrared filter (IR) (740) placed on the image side (732) of the third lens (730) and an image Between the faces (750); the infrared filter (740) is made of glass and does not affect the focal length of the image pickup lens system of the present invention.

The detailed optical data of the seventh embodiment is shown in Table 18, and the aspherical data is as shown in Table 19, in which the unit of curvature radius, thickness, and focal length is mm, and HFOV is defined as half of the maximum angle of view.

The representation of the aspheric curve equation of the seventh embodiment is like the form of the first embodiment. In addition, the parameters of the respective relationships are as explained in the first embodiment, but the values of the respective relationships are as listed in Table 20:

Eighth Embodiment

For the eighth embodiment of the present invention, please refer to FIG. 8A. For the aberration curve of the eighth embodiment, refer to FIG. The image pickup lens system of the eighth embodiment is mainly composed of three lenses, and includes, from the object side to the image side, a first lens (810) having a positive refractive power, and the object side surface (811) is a convex surface and an image side surface ( 812) is a convex surface, the material is plastic, the object side surface (811) and the image side surface (812) of the first lens (810) are aspherical surfaces; a second lens (820) having a negative refractive power, the object side (821) is concave And the image side surface (822) is a convex surface, and the material is plastic. The object side surface (821) and the image side surface (822) of the second lens (820) are aspherical surfaces; and a third lens having a negative refractive power (830) The object side surface (831) is a convex surface and the image side surface (832) is a concave surface, and the material is plastic. The object side surface (831) and the image side surface (832) of the third lens (830) are aspherical surfaces, and The object side surface (831) and the image side surface (832) of the third lens (830) are provided with at least one inflection point; wherein the lens of the lens system having the refractive power is three lenses, which are respectively the first lens (810), the second lens (820) and the third lens (830); and the third lens (810, 820, 830) has a largest central thickness of the second lens (820); wherein The imaging lens system is further provided with an aperture (800) disposed between the object and the first lens (810); and an infrared filter (840) is disposed on the third lens ( Between the image side surface (832) of 830) and an image forming surface (850); the infrared filter filter (840) is made of glass and does not affect the focal length of the image pickup lens system of the present invention.

The detailed optical data of the eighth embodiment is shown in Table 21, and the aspherical data is as shown in Table 22, wherein the unit of curvature radius, thickness and focal length is mm, and HFOV is defined as half of the maximum viewing angle.

The representation of the aspheric curve equation of the eighth embodiment is the same as that of the first embodiment. In addition, the parameters of the respective relationships are as explained in the first embodiment, but the values of the respective relationships are as listed in Table 23:

Ninth Embodiment

For the ninth embodiment of the present invention, please refer to FIG. 9A. For the aberration curve of the ninth embodiment, please refer to FIG. The image pickup lens system of the ninth embodiment is mainly composed of three lenses, and includes, from the object side to the image side, a first lens (910) having a positive refractive power, and the object side surface (911) is a convex surface and an image side surface ( 912) is a concave surface, the material is plastic, the object side surface (911) and the image side surface (912) of the first lens (910) are aspherical surfaces; a second lens (920) having a negative refractive power, the object side (921) is a concave surface and the image side surface (922) is a convex surface, and the material is plastic. The object side surface (921) and the image side surface (922) of the second lens (920) are aspherical surfaces; and a negative refractive power The third lens (930) has a convex side and an image side surface (932) as concave surfaces, and is made of plastic. The object side surface (931) and the image side surface (932) of the third lens (930) are both An aspherical surface, wherein the object side surface (931) and the image side surface (932) of the third lens (930) are provided with at least one inflection point; wherein the lens of the lens system having the refractive power is three lenses, respectively The first lens (910), the second lens (920), and the third lens (930); and the center of the three lenses (910, 920, 930) having the largest thickness is the second lens (920) );its The camera lens system is further provided with an aperture (900) disposed between the object and the first lens (910); and an infrared filter (IR) (940) is disposed on the first The image side surface (932) of the three lens (930) is interposed between an image forming surface (950); the infrared filter filter (940) is made of glass and does not affect the focal length of the image pickup lens system of the present invention.

The detailed optical data of the ninth embodiment is as shown in Table 24, and its aspherical The surface data is shown in Table 25. The radius of curvature, thickness and focal length are in mm, and HFOV is defined as half of the maximum viewing angle.

The representation of the aspheric curve equation of the ninth embodiment is the same as that of the first embodiment. In addition, the parameters of the respective relationships are as explained in the first embodiment, but the values of the respective relationships are as listed in Table 26:

Tenth Embodiment

For the tenth embodiment of the present invention, please refer to FIG. 10A. For the aberration curve of the tenth embodiment, please refer to FIG. The image pickup lens system of the tenth embodiment is mainly composed of three lenses, and includes, from the object side to the image side, a first lens (1010) having a positive refractive power, and the object side surface (1011) is a convex surface and an image side surface ( 1012) is a concave surface, the material is plastic, the object side surface (1011) and the image side surface (1012) of the first lens (1010) are aspherical surfaces; a second lens (1020) having a negative refractive power, the object side (1021) is a concave surface and an image side surface (1022) is a convex surface, the material of which is plastic, the object side surface (1021) and the image side surface (1022) of the second lens (1020) are aspherical surfaces; and a negative refractive power The third lens (1030) has a convex side and an image side surface (1032) which are concave surfaces and are made of plastic. The object side surface (1031) and the image side surface (1032) of the third lens (1030) are both An aspheric surface, and the object side surface (1031) and the image side surface (1032) of the third lens (1030) are provided with at least one inflection point; wherein the lens of the lens system having refractive power is three lenses, respectively The first lens (1010), the second lens (1020), and the first The third lens (1030); and the third lens (1010, 1020, 1030) has the largest central thickness of the second lens (1020); wherein the camera lens system is further provided with an aperture (1000) placed on the camera Between the object and the first lens (1010); further comprising an infrared filter (IR-filter) (1040) placed on the image side (1032) of the third lens (1030) and an imaging surface (1050) The material of the infrared filter (1040) is glass and it does not affect the focal length of the image pickup lens system of the present invention.

The detailed optical data of the tenth embodiment is shown in Table 27, and the aspherical data is as shown in Table 28, wherein the unit of curvature radius, thickness and focal length is mm, and HFOV is defined as half of the maximum viewing angle.

The representation of the aspheric curve equation of the tenth embodiment is like the form of the first embodiment. In addition, the parameters of the respective relationships are as explained in the first embodiment, but the values of the respective relationships are as listed in Table 29:

Eleventh Embodiment

For the eleventh embodiment of the present invention, please refer to FIG. 11A. For the aberration curve of the eleventh embodiment, refer to FIG. 11B. The image pickup lens system of the eleventh embodiment is mainly composed of three lenses, and includes, from the object side to the image side, a first lens (1110) having a positive refractive power, and the object side surface (1111) is a convex surface and an image side surface. (1112) is a concave surface, the material is plastic, the object side surface (1111) and the image side surface (1112) of the first lens (1110) are aspherical surfaces; a second lens (1120) having a negative refractive power, Side (1121) is concave The surface and the image side surface (1122) are convex surfaces and are made of plastic. The object side surface (1121) and the image side surface (1122) of the second lens (1120) are aspherical surfaces; and a third lens having a negative refractive power ( 1130), the object side surface (1131) is a convex surface and the image side surface (1132) is a concave surface, and the material is plastic. The object side surface (1131) and the image side surface (1132) of the third lens (1130) are aspherical surfaces, and The object side surface (1131) and the image side surface (1132) of the third lens (1130) are provided with at least one inflection point; wherein the refractive power lens of the camera lens system is three lenses, which are respectively the first a lens (1110), the second lens (1120), and the third lens (1130); and the third lens (1110, 1120, 1130) has a center thickness of the second lens (1120); wherein The imaging lens system is further provided with an aperture (1100) placed between the object and the first lens (1110); and an infrared filter (IR-filter) (1140) is disposed on the third lens Between the image side surface (1132) of (1130) and an image forming surface (1150); the infrared filter filter (1140) is made of glass and does not affect the imaging lens system of the present invention. focal length.

The detailed optical data of the eleventh embodiment is shown in Table 30, and the aspherical data is as shown in Table 31, wherein the unit of curvature radius, thickness, and focal length is mm, and HFOV is defined as half of the maximum viewing angle.

The eleventh embodiment is represented by the aspheric curve equation as in the form of the first embodiment. In addition, the parameters of the respective relationships are as explained in the first embodiment, but the values of the respective relationships are as listed in Table 32:

Table 1 to Table 32 show different numerical value change tables of the embodiment of the image pickup lens system of the present invention. However, the numerical changes of the various embodiments of the present invention are experimentally obtained, and even if different values are used, the products of the same structure should belong to the present invention. The above description and the drawings are merely illustrative and are not intended to limit the scope of the invention.

100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100. . . aperture

110, 210, 310, 410, 510, 610, 710, 810, 910, 1010, 1110. . . First lens

111, 211, 311, 411, 511, 611, 711, 811, 911, 1011, 1111. . . Side of the object

112, 212, 312, 412, 512, 612, 712, 812, 912, 1012, 1112. . . Image side

120, 220, 320, 420, 520, 620, 720, 820, 920, 1020, 1120. . . Second lens

121, 221, 321, 421, 521, 621, 721, 821, 921, 1021, 1121. . . Side of the object

122, 222, 322, 422, 522, 622, 722, 822, 922, 1022, 1122. . . Image side

130, 230, 330, 430, 530, 630, 730, 830, 930, 1030, 1130. . . Third lens

131, 231, 331, 431, 531, 631, 731, 831, 931, 1031, 1131. . . Side of the object

132, 232, 332, 432, 532, 632, 732, 832, 932, 1032, 1132. . . Image side

140, 240, 340, 440, 540, 640, 740, 840, 940, 1040, 1140. . . Infrared filter

150, 250, 350, 450, 550, 650, 750, 850, 950, 1050, 1150. . . Imaging surface

The focal length of the camera lens system is f

The focal length of the second lens is f2

The focal length of the third lens is f3

The second lens has a dispersion coefficient of V2

The thickness of the first lens on the optical axis is CT1

The thickness of the second lens on the optical axis is CT2

The thickness of the third lens on the optical axis is CT3

The radius of curvature of the object side of the first lens is R1

The radius of curvature of the image side of the first lens is R2

The radius of curvature of the image side of the third lens is R6

The distance between the first lens and the second lens on the optical axis is T12

The distance between the second lens and the third lens on the optical axis is T23

The center thickness of the first lens is CT1

The center thickness of the second lens is CT2

The center thickness of the third lens is CT3

The second lens has a dispersion coefficient of V2

The distance from the aperture to the image side of the third lens on the optical axis is Sd

The distance from the object side of the first lens to the image side of the third lens on the optical axis is Td

The first A is a schematic view of an optical system of the first embodiment of the present invention.

The first B diagram is an aberration diagram of the first embodiment of the present invention.

Second A is a schematic view of an optical system of a second embodiment of the present invention.

The second B diagram is an aberration diagram of the second embodiment of the present invention.

Third A is a schematic view of an optical system of a third embodiment of the present invention.

The third B diagram is an aberration diagram of the third embodiment of the present invention.

Figure 4A is a schematic view of an optical system of a fourth embodiment of the present invention.

The fourth B diagram is an aberration diagram of the fourth embodiment of the present invention.

Figure 5A is a schematic view of an optical system of a fifth embodiment of the present invention.

Fig. 5B is a diagram showing aberrations of the fifth embodiment of the present invention.

Figure 6A is a schematic view of an optical system of a sixth embodiment of the present invention.

Fig. 6B is a diagram showing aberrations of the sixth embodiment of the present invention.

Figure 7A is a schematic view of an optical system of a seventh embodiment of the present invention.

Fig. 7B is a diagram showing aberrations of the seventh embodiment of the present invention.

Figure 8A is a schematic view of an optical system of an eighth embodiment of the present invention.

The eighth diagram B is an aberration diagram of the eighth embodiment of the present invention.

Figure 9A is a schematic view of an optical system of a ninth embodiment of the present invention.

The ninth B diagram is an aberration diagram of the ninth embodiment of the present invention.

Figure 10A is a schematic view of an optical system of a tenth embodiment of the present invention.

Fig. 10B is a diagram showing aberrations of the tenth embodiment of the present invention.

Eleventh A is a schematic view of an optical system of an eleventh embodiment of the present invention.

The eleventh B is a graph of aberrations of the eleventh embodiment of the present invention.

100. . . aperture

110. . . First lens

111. . . Side of the object

112. . . Image side

120. . . Second lens

121. . . Side of the object

122. . . Image side

130. . . Third lens

131. . . Side of the object

132. . . Image side

140. . . Infrared filter

150. . . Imaging surface

Claims (23)

An imaging lens system, from the object side to the image side, in sequence: a first lens having a positive refractive power; and a second lens having a negative refractive power, the object side is concave and the side surface is convex, and the object side surface thereof The side surface is aspherical, and the material is plastic; and a third lens with negative refractive power, the object side is convex and the image side is concave, and the object side and the image side are aspherical, the object side and At least one surface of the image side surface is provided with at least one inflection point, and the material thereof is plastic; wherein the lens of the lens system having refractive power is three pieces of the first lens, the second lens and the third lens a lens; and the center of the three lenses having the largest thickness is the second lens; the center thickness of the first lens is CT1, the center thickness of the second lens is CT2, and the center thickness of the third lens is CT3, The radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the first lens is R2, and the distance between the second lens and the third lens on the optical axis is T23, which satisfies the following relationship: 0.35 <CT1/CT2<1.00; 0.35<CT3/CT2<1.00;-3 .0<(R1+R2)/(R1-R2)<0; and 0.65<T23/CT3<1.80. The camera lens system according to claim 1, wherein the first lens has a radius of curvature of the object R1, and the curvature radius of the image side of the first lens is R2, which satisfies the following relationship: -2.5<(R1 +R2)/(R1-R2)<-0.5. The imaging lens system according to claim 2, wherein the total focal length of the imaging lens system is f, and the focal length of the third lens is f3, which satisfies the following relationship: -0.45 < f / f3 < 0. The image pickup lens system of claim 3, wherein the image pickup lens system is further provided with an aperture, the distance from the aperture to the image side of the third lens on the optical axis is Sd, and the object side of the first lens The distance from the image side of the third lens to the optical axis is Td, which satisfies the following relationship: 0.65 < Sd / Td < 0.90. The imaging lens system of claim 1, wherein the focal length of the second lens is f2, and the focal length of the third lens is f3, which satisfies the following relationship: 0 < f2 / f3 < 0.75. The camera lens system of claim 5, wherein a distance between the first lens and the second lens on the optical axis is T12, and the second lens and the third lens are on the optical axis. The distance is T23, which satisfies the following relationship: 0.5<T12/T23<1.55. The imaging lens system of claim 5, wherein the total focal length of the imaging lens system is f, and the focal length of the second lens is f2, which satisfies the following relationship: -0.70 < f / f2 < - 0.25. The image pickup lens system according to claim 1, wherein the third lens has an image side curvature radius of R6, and the total focal length of the image pickup lens system is f, which satisfies the following relationship: 0.1<R6/f<0.6 . The camera lens system of claim 1, wherein the first lens has a center thickness of CT1, the second lens has a center thickness of CT2, and the third lens has a center thickness of CT3, and the following relationship is satisfied. : 0.50 < CT1/CT2 < 0.94; and 0.50 < CT3 / CT2 < 0.94. The imaging lens system according to claim 1, wherein the second lens has a dispersion coefficient of V2 and satisfies the following relationship: 15 < V2 < 24.5. The camera lens system of claim 1, wherein the first lens has a center thickness of CT1, the second lens has a center thickness of CT2, and the third lens has a center thickness of CT3, and the following relationship is satisfied. : 0.80 mm<CT1+CT2+CT3<1.85 mm. An imaging lens system, from the object side to the image side, sequentially: a first lens having a positive refractive power; and a second lens having a negative refractive power, the object side is concave and the side surface is convex, and the object side surface thereof The side surface is aspherical, and the material is plastic; and a third lens with negative refractive power, the object side is convex and the image side is concave, and the object side and the image side are aspherical, the object side and At least one surface of the image side surface is provided with at least one inflection point, and the material thereof is plastic; wherein the lens of the lens system having refractive power is three pieces of the first lens, the second lens and the third lens a lens; and the center of the three lenses having the largest thickness is the second lens; the center thickness of the first lens is CT1, the center thickness of the second lens is CT2, and the center thickness of the third lens is CT3, The radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the first lens is R2, and the distance between the first lens and the second lens on the optical axis is T12, and the second lens and the second lens The distance between the three lenses on the optical axis is T23. The following relationship is satisfied: 0.35<CT1/CT2<1.00; 0.35<CT3/CT2<1.00; -3.0<(R1+R2)/(R1-R2)<0; and 0.5<T12/T23<1.55. The camera lens system of claim 12, wherein the first lens has a radius of curvature of the object side surface R1, and the image side curvature radius of the first lens is R2, which satisfies the following relationship: -2.5<(R1 +R2)/(R1-R2)<-0.5. The image pickup lens system of claim 13, wherein the image pickup lens system further comprises an aperture, the distance from the aperture to the image side of the third lens on the optical axis is Sd, and the object side of the first lens The distance from the image side of the third lens to the optical axis is Td, which satisfies the following relationship: 0.65 < Sd / Td < 0.90. The imaging lens system of claim 14, wherein the focal length of the second lens is f2, and the focal length of the third lens is f3, which satisfies the following relationship: 0 < f2 / f3 < 0.75. The imaging lens system of claim 14, wherein the total focal length of the imaging lens system is f, and the focal length of the second lens is f2, which satisfies the following relationship: -0.70 < f / f2 < - 0.25. The camera lens system of claim 12, wherein the image side curvature radius of the third lens is R6, and the overall focal length of the image lens system is f, which satisfies the following relationship: 0.1<R6/f<0.6 . The camera lens system of claim 12, wherein the first lens has a center thickness of CT1 and the second lens has a center thickness of CT2, which satisfies the following relationship: 0.50<CT1/CT2<0.94. The camera lens system of claim 12, wherein the first lens has a center thickness of CT1, the second lens has a center thickness of CT2, and the third lens has a center thickness of CT3, and the following relationship is satisfied. : 0.80 mm<CT1+CT2+CT3<1.85 mm. An imaging lens system, from the object side to the image side, in sequence: a first lens having a positive refractive power; and a second lens having a negative refractive power, the object side is concave and the side surface is convex, and the object side surface thereof The side surface is aspherical, and the material is plastic; and a third lens with negative refractive power, the object side is convex and the image side is concave, and the object side and the image side are aspherical, the object side and At least one surface of the image side surface is provided with at least one inflection point, and the material thereof is plastic; wherein the lens of the lens system having refractive power is three pieces of the first lens, the second lens and the third lens a lens; and the center of the three lenses having the largest thickness is the second lens; the center thickness of the first lens is CT1, the center thickness of the second lens is CT2, and the center thickness of the third lens is CT3, The radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the first lens is R2, and the dispersion coefficient of the second lens is V2, which satisfies the following relationship: 0.35<CT1/CT2<1.00; 0.35<CT3 /CT2<1.00; -3.0<(R1+R2)/(R1-R2)<0.0; and 15< V2 < 24.5. The camera lens system of claim 20, wherein the first lens has a center thickness of CT1 and the second lens has a center thickness of CT2, which satisfies the following relationship: 0.50<CT1/CT2<0.94. The camera lens system of claim 20, wherein the first lens has a center thickness of CT1, the second lens has a center thickness of CT2, and the third lens has a center thickness of CT3, and the following relationship is satisfied. : 0.80 mm<CT1+CT2+CT3<1.85 mm. The camera lens system of claim 20, wherein a distance between the first lens and the second lens on the optical axis is T12, and the second lens and the third lens are on the optical axis. The distance is T23, which satisfies the following relationship: 0.5<T12/T23<1.55.